From 827eb4393c8a06de0c8673888a5734170e218a1d Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 30 Apr 2018 23:58:48 -0400
Subject: [PATCH] Tweak new jsonb_plperl test cases to work with old Perl
 versions.

The previous coding here didn't actually produce Inf or NaN double
values in Perl versions 5.8.x.  Adopt a suggestion from stackoverflow.

Discussion: https://postgr.es/m/28585.1525131438@sss.pgh.pa.us
---
 contrib/jsonb_plperl/expected/jsonb_plperl.out  | 4 ++--
 contrib/jsonb_plperl/expected/jsonb_plperlu.out | 4 ++--
 contrib/jsonb_plperl/sql/jsonb_plperl.sql       | 4 ++--
 contrib/jsonb_plperl/sql/jsonb_plperlu.sql      | 4 ++--
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/contrib/jsonb_plperl/expected/jsonb_plperl.out b/contrib/jsonb_plperl/expected/jsonb_plperl.out
index d6c3becf63..c16d16dab4 100644
--- a/contrib/jsonb_plperl/expected/jsonb_plperl.out
+++ b/contrib/jsonb_plperl/expected/jsonb_plperl.out
@@ -43,7 +43,7 @@ CREATE FUNCTION testInf() RETURNS jsonb
 LANGUAGE plperl
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'Inf';
+$val = 9**9**9;  # we assume this will overflow to +Inf
 return $val;
 $$;
 SELECT testInf();
@@ -53,7 +53,7 @@ CREATE FUNCTION testNaN() RETURNS jsonb
 LANGUAGE plperl
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'NaN';
+$val = sin(9**9**9);  # we assume sin(inf) will yield NaN
 return $val;
 $$;
 SELECT testNaN();
diff --git a/contrib/jsonb_plperl/expected/jsonb_plperlu.out b/contrib/jsonb_plperl/expected/jsonb_plperlu.out
index 65ed21f3b2..e84ea7cf66 100644
--- a/contrib/jsonb_plperl/expected/jsonb_plperlu.out
+++ b/contrib/jsonb_plperl/expected/jsonb_plperlu.out
@@ -43,7 +43,7 @@ CREATE FUNCTION testInf() RETURNS jsonb
 LANGUAGE plperlu
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'Inf';
+$val = 9**9**9;  # we assume this will overflow to +Inf
 return $val;
 $$;
 SELECT testInf();
@@ -53,7 +53,7 @@ CREATE FUNCTION testNaN() RETURNS jsonb
 LANGUAGE plperlu
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'NaN';
+$val = sin(9**9**9);  # we assume sin(inf) will yield NaN
 return $val;
 $$;
 SELECT testNaN();
diff --git a/contrib/jsonb_plperl/sql/jsonb_plperl.sql b/contrib/jsonb_plperl/sql/jsonb_plperl.sql
index 5f94a4c51a..436e18730f 100644
--- a/contrib/jsonb_plperl/sql/jsonb_plperl.sql
+++ b/contrib/jsonb_plperl/sql/jsonb_plperl.sql
@@ -38,7 +38,7 @@ CREATE FUNCTION testInf() RETURNS jsonb
 LANGUAGE plperl
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'Inf';
+$val = 9**9**9;  # we assume this will overflow to +Inf
 return $val;
 $$;
 
@@ -49,7 +49,7 @@ CREATE FUNCTION testNaN() RETURNS jsonb
 LANGUAGE plperl
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'NaN';
+$val = sin(9**9**9);  # we assume sin(inf) will yield NaN
 return $val;
 $$;
 
diff --git a/contrib/jsonb_plperl/sql/jsonb_plperlu.sql b/contrib/jsonb_plperl/sql/jsonb_plperlu.sql
index 9c0c083c99..339486ddb6 100644
--- a/contrib/jsonb_plperl/sql/jsonb_plperlu.sql
+++ b/contrib/jsonb_plperl/sql/jsonb_plperlu.sql
@@ -38,7 +38,7 @@ CREATE FUNCTION testInf() RETURNS jsonb
 LANGUAGE plperlu
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'Inf';
+$val = 9**9**9;  # we assume this will overflow to +Inf
 return $val;
 $$;
 
@@ -49,7 +49,7 @@ CREATE FUNCTION testNaN() RETURNS jsonb
 LANGUAGE plperlu
 TRANSFORM FOR TYPE jsonb
 AS $$
-$val = 0 + 'NaN';
+$val = sin(9**9**9);  # we assume sin(inf) will yield NaN
 return $val;
 $$;
 
-- 
2.40.0